Incandescent gas-lamp.



T. J. LITLE, JR- INUANDESGENT GAS LAMP.

APPLICATION FILED AUG. 19, 1911.

1,031,128. Patented July 2,1912.

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T. J. LITLE, JR. INOANDESOENT GAS LAMP.

APPLIOATION FILED AUG.19, 1911.

1,031,128. Patented July 2, 1912.

3 SHEETS-SHEET 2.

WITNESSES INVENTOR K mx umwh COLUMBIA PLANOGRAPH 60-. WASHINGTON, D. c

T. J. LITLB, JR. INGANDESOENT GAS LAMP.

APPLICATION FILED AUG.19, 1911.

1,031,128. PatentedJuly2,1912.

3 SHEETS-SHEET 3.

STATES PATENT OFFICE.

THOMAS JAMES LITLE, JR., 011 WOODBURY, NEW JERSEY, ASSIGNOR TO WELSBACHLIGHT COMPANY, OF GLOUCESTER CITY, NEW JERSEY, A CORPORATION OF NEWJERSEY.

INGANDESCENT GAS-LAMP.

Specification of Letters Patent.

Patented July 2, 1912.

Original application filed July 15, 1910, Serial No. 572,190. Dividedand this application filed August 19,

To all whom it may concern:

Be it known that I, THOMAS J. LITLE, J r., resident of Woodbury,Gloucester county, New Jersey, have invented a new and usefulIncandescent GasLamp, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which Figure 1 is an elevation of a lampembodying my invention; Fig. 2 is a vertical section of the same; Fig. 3is a top plan view; and Fig. 4 is a detail view showing the valveactuating devices.

My invention has relation to incandescent gas lamps, and moreparticularly to lamps of the manifold inverted type.

The invention is designed to provide a novel construction andarrangement of the gas and air mixing devices, whereby a largelyincreased efliciency is obtained.

The invention also provides means of novel character for centering thegas jet tube with reference to the mixer tube; also a novel arrangementof air regulating device or shutter, which is operated in conjunctionwith the gas valve to give a rich mixture of gas in lighting the lamp,thereby preventing flash-backs, and also giving a rich mixture when thevalve is closed, thus preventing explosions in the manifold chamberwhich would injure the mantles.

Other objects of my invention and novel features thereof willhereinafter appear.

Referring to the accompanying drawings, the numeral 2 designates thecasing of the lamp, which is provided with the vertical chimney portion3, forming an extension of the lower chimney section 4 which is securedwithin the lower portion of the casing. This casing may be of anydesired ornamental form. It is shown as having outwardly flared upperand lower portions 2 and 2 which are suitably beaded and ornamented.

5 designates the globe-holding ring, which is secured to the lowerportion of the casing in any suitable manner, such as indicated at 7 and8. The globe holder, however, and the means of securing the same, formno part of the present invention.

9 designates the globe. v

10 is the gas supply pipe having a vertical arm which leads centrally tothe top of the chimney 3 into the upper portion of which Serial No.644,926.

it extends, and is then bent outwardly as shown at 10", and extendsradially across the chimney and through a slot or opening in the upperedge portion of the same. It is then carried downwardly as shown at 10through a slot 11 in the casing portion 2 The lower end of the portion10 is connected to a valve casing 12.

13 is a valve spindle, carrying a suitable valve 14 within said casing.

15 is the gas jet tube, which is connected to the outlet of the valvechamber, and which extends into the upper end of the mixing tube 16.

The valve stem 13 has rigidly secured to it a ratchet 17, which isarranged to be operated by the pawl end 18 of an actuating lever 19.This actuating lever has a loose pivotal connection at 20 with a plate21, which is loosely mounted on the valve spindle, and which is providedwith a projection 22 extending loosely through a slot 23 in theactuating arm of the lever 19. A spring 24 is coiled around the endportion of the spindle, one end of this spring engaging the projection22, as shown at 25, and the other end extending over a pin or arbor 26,and terminating adjacent to the periphery of the ratchet 17 to engagethe teeth thereof and form a stop for holding the ratchet against backmovement after it has been actuated. The plate 21 has a projecting stoparm 27, which is arranged to engage the pin or arbor 26, and limit theupward movement of the lever 19; and also has another projecting arm 28,which is de signed to engage one arm of a lever 29 (as best seen in Fig.1), which is pivoted at 30 'to the valveoasing. The other arm of thislever is engaged with the bent arm 31 of an air shutter device 32, whichis arranged to reciprocate within the upper open end of the mixing tube16.

The lever 19 is normally held in its upward position, shown in Figs. 1and 4, by the tension of the spring 24. The valve being closed, adownward movement of said lever causes its pawl to engage the ratchet 17and thus rotate the valve stem sufficiently to open the valve. At thesame time the leverengages the arm of the lever 29 and raises theshutter 32 so as to partially close the entrance of air to the mixertube, thus giving a rich mixture in starting, which preventsflash-backs. AS soon as the lever is released, the spring returns it toits former position; the end of the spring 24 engages a tooth of theratchet and holds the valve in its open position, and the projection 28of the plate 21 engages the under side of the lever 29 to insure themovement of the shutter back to its normal lowered position, and to holdit in such posit-ion. The next operation of the lever will operate theratchet another step to close the valve, the shutter being again raised,giving a rich mixture to prevent explosion in the manifold. The end ofthe valve stem is preferably provided with a double pointer 33, which byits position will indicate whether the valve is open or closed.

For the purpose of adjusting the normal position of the shutter tocontrol the amount of air entering the mixing tube, I provide theadjusting screw 34, which engages the bent arm 31 of the shutter andthereby determines its normal lowered position with respect to the upperend of the mixing tube.

It is of considerable importance that the endof the gas supply or jettube shall be directed axially into the mixer tube and properlycentered, so as to entrain the proper amount of air. For this purpose, Iform said tube in two parts, the upper part designated at 15 having athreaded bearing in its outer end for the usual needle valve 35, and thelower end portion having a flange 15 which is arranged to seat againstthe outwardly turned and overhung end 16 of the mixer tube. Thisoutwardly turned 7 and overhung end has a perforation to receive a bossor projection 15 of the upper section 15 of the jet tube, and whichprojection is exteriorly threaded. The lower member 15*- of the tube,which has an orifice therein for the point of the needle valve, is inthe form of a nut, having an internal thread to engage the externallythreaded boss 15". By thisconstruction the jet tube may be accuratelycentered with respect to the mixing tube.

The mixing tube extends obliquely downward and inward through an openingin the side of the chimney portion 3 of the casing,

being of gradually enlarging cross-sectional area toward its lower end,which opens into and carries the centrally located manifold 36. Theincreasing area of the mixing tube toward its lower end provides for theexpansion of gas and air as it becomes heated, and has been found tovery greatly increase the efficiency of the lamp.

37 designates burner tubes, of which any desired number may 'beemployed, and which are connected to the manifold. The manifold 36 isprovided with an interior chamber 36 of suificient area to provide'forthoroughly mixing of the gas and air before it passes to the burnertubes.

38 designate the usual mantles of the inverted type.

39 designates an impedance cartridge which is adapted to'be placedacross the tube may be arranged as shown to form one' arm of aspider,having other radial arms t? (see Fig. 3), which support thechimney, the arm 10 of the supply tube having a flange 48 which isfirmly secured by screws or other means to the chimney.

49 designates a pilot light supplied by the tube 50 having theregulating screw 51.

My invention provides means of simple and effective character forefiecting the proper mixture of air and gas, and for giving a richmixture of gas in lighting the lamp, whereby flash-backs are avoided.

It will be obvious that various changes may be made in the details ofconstruction and arrangement of the parts without departing from thespirit and scope of my invention as defined in the appended claims.

This application is a division of my pending application Serial No.572,190, filed July 15th, 1910.

I claim 1 1. In a gas lamp, a mixing tube, a gas valve, a movable airshutter and actuating connections for the gas valve and the air shutterwhereby when the gas valve is actuated, the air shutter will be moved tomomentarily decrease the amount of air admitted to the mixing tube;substantially as described.

2. In a gas lamp, a mixing tube, a gas valve, and an air shutter movablyseated in the upper portion of the mixing tube, and actuatingconnections between the gas valve and air shutter; substantially asdescribed.

3. In a gas lamp, a mixing tube, a valve device for the air admission tosaid tube in the upper end thereof, a valve controlling the supply ofgas'to said tube, an actuating device for the valve, and connectionsbetween such actuating device and the air valve; substantially asdescribed.

4. In a gas lamp, a mixing tube having an air supply and a gas supplyconnected to the upper end thereof, valves for controlling the air andgas supply, and actuating means connected to said valves whereby the airvalve is actuatedto momentarily decrease the amount of'air supply whenthe gas valve is opened or closed; substantially as described.

5. In a gas lamp, a mixing tube, a gas valve and an air shutterconnected to the upper end of said tube, valve-actuating connectionsconnected to said valve, and an operating device between the valveactuating connections and the shutter arranged to shift the shutter tomomentarily decrease the air supply when the valve is actuated;substantially as described.

6. A gas lamp having a mixing tube, a movable air shutter in the upperend thereof, a gas supply tube, a valve controlling the gas supply, andconnections between the valve and the shutter to move the shutter tomomentarily decrease the amount of air admitted to the mixing tube whenthe gas valve is actuated; substantially as described.

7. A gas lamp having a mixing tube, a gas supply tube, an air shutter inthe upper end of the mixing tube, an adjusting device for adjusting theair shutter, actuating mechanism for shifting the valve, and operatingmeans between the valve actuating connections and the shuttertomomentarily shift the shutter to choke the air supply when the gasvalve is opened; substantially as described.

8. A gas lamp having a mixing tube, a gas supply tube, a valvecontrolling the gas supply, an air shutter in the upper end of themixing tube, an operating lever for actuating the gas valve, andactuating connections connected to the shutter arranged to shift theshutter to momentarily decrease the amount of air supply to the mixingtube when the valve lever is operated; substantially as described.

9. A gas lamp having a mixing tube, a gas supply tube connected to theupper end of the mixing tube, a valve controlling the gas supply, aratchet wheel connected to the gas valve, a ratchet arranged to move theratchet wheel, means for actuating the ratchet, an air shutter, andshutter actuating means connected to said shutter arranged to beactuated by the ratchet actuating means to decrease the air supply tothe mixing tube when the ratchet is actuated in one direction;substantially as described.

10. A gas lamp having a mixing tube, a gas supply tube connected to theupper end of the mixing tube, a valve controlling the gas supply, aratchet wheel connected to the gas valve, a ratchet arranged to move theratchet wheel, means for moving the ratchet, an air shutter, shutteractuating means connected to said shutter arranged to be actuated by theratchet moving means to decrease the air supply to the mixing tube whenthe ratchet is actuated in one direction, and means to return theshutter to its initial position when the ratchet is released;substantially as described.

In testimony whereof, I have hereunto set my hand.

THOMAS JAMES LITLE, JR.

Witnesses:

R. B. lVAsHING'roN, J. H. Jormson.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

